See a list of possible causes in order from the most common to the least.

Strep throat is a bacterial infection that causes inflammation and pain in the throat. It's especially common in children. Look out for sudden fever, a red throat with white patches, headache, and chills.

A venomous snake bite can be deadly and is a medical emergency. Even a bite from a harmless snake can cause infection or an allergic reaction, producing symptoms like pain and swelling, convulsions, nausea, or paralysis.

Healthline’s mission is to make the people of the world healthier through the power of information. We do this by creating quality health information that is authoritative, approachable, and actionable.

Join more than 30 million monthly visitors like you and let Healthline be your guide to better health.